| BellwethrB2B | B2B | Wamego, United States | — | bellwethr.com |
| BenB2B | B2B | — | — | thanksben.com |
| Benchmark LabsIndustrials | Industrials | San Diego, United States | Roberto Toro | benchmarklabs.com |
| BenchSciB2B | B2B | United States | Liran Belenzon | benchsci.com |
| BenchspanB2B | B2B | San Francisco, United States | | benchspan.com |
| BeneKineticB2B | B2B | Rockville, United States | — | benekinetic.com |
| BentoBoxOther | Other | New York City, United States | Krystle Mobayeni | getbento.com |
| Besimple AIB2B | B2B | Redwood City, United States | | besimple.ai |
| Best Food TrucksOther | Other | Los Angeles, United States | Eli Goldin | bestfoodtrucks.com |
| BestDefense.ioB2B | B2B | Clearwater, United States | — | bestdefense.io |
| BetterFintech | Fintech | Tel Aviv, Israel | — | bettercharge.ai |
| Better Living TechnologiesIndustrials | Industrials | Austin, United States | — | betterlivingtech.net |
| Better OriginIndustrials | Industrials | — | Miha Pipan | betterorigin.co.uk |
| BetterteemB2B | B2B | Bonifacio Global City, Philippines | — | betterteem.com |
| BetterUpB2B | B2B | United States | Alexi Robichaux | betterup.com |
| BeviIndustrials | Industrials | Concord, United States | Sean Grundy | bevi.co |
| BevzOther | Other | Van Nuys, United States | — | bevz.com |
| Beyond Reach LabsIndustrials | Industrials | — | | beyondreachlabs.com |
| BeyonicFintech | Fintech | Kampala, Uganda | Luke Kyohere | beyonic.com |
| BiB BatteriesIndustrials | Industrials | Paris, France | — | bib-batteries.fr |
| BidflowOther | Other | New York, United States | Jesse Choe | usebidflow.com |
| BifrostB2B | B2B | Singapore, Singapore | Peder Olesen | bifrost.ai |
| Big WheelbarrowIndustrials | Industrials | Austin, United States | — | bigwheelbarrow.com |
| BigTeamOther | Other | Atlanta, United States | — | bigteam.co |
| BildFintech | Fintech | New York City, United States | — | getbild.com |
| Bild CorpB2B | B2B | Austin, United States | — | bild-engineering.io |
| BioInteractive TechnologiesOther | Other | Vancouver, Canada | — | tenzrhealth.com |
| BioledgerIndustrials | Industrials | London, United Kingdom | — | bioledger.io |
| BiolincoB2B | B2B | Baltimore, United States | — | biolinco.com |
| Biomod AIOther | Other | Zuid-Scharwoude, Netherlands | — | biomodai.com |
| BioOrbitHealthcare | Healthcare | — | — | bioorbit.space |
| BippitFintech | Fintech | London, United Kingdom | Sam Lathigra | bippit.com |
| BirdhouseEducation | Education | New York City, United States | — | flybirdhouse.com |
| BirdstopOther | Other | San Francisco, United States | — | birdstop.io |
| BITE DataB2B | B2B | Leesburg, United States | — | bitedata.io |
| BitfinderOther | Other | San Francisco, United States | Kevin Lee | getawair.com |
| BitfusionB2B | B2B | Sunnyvale, United States | Sherif Sakr | bitfusion.io |
| Bizible Marketing AnalyticsB2B | B2B | Seattle, United States | Aaron Bird | bizible.com |
| BIZZONFintech | Fintech | London, United Kingdom | — | agentcash.com |
| Bizzy AIB2B | B2B | San Francisco, United States | | usebizzy.com |
| BlaBlaCarConsumer | Consumer | — | Frédéric Mazzella | blablacar.com |
| BlackOakTVOther | Other | New York City, United States | — | blackoak.tv |
| Blackstock & WeberOther | Other | New York City, United States | Peter Sherwood | blackstockandweber.com |
| Blank BioHealthcare | Healthcare | San Francisco, United States | | blank.bio |
| BlaxelB2B | B2B | — | — | blaxel.ai |
| BlinkOther | Other | London, United Kingdom | Sean Nolan | joinblink.com |
| Blink IdentityB2B | B2B | Austin, United States | Mary Haskett | blinkidentity.com |
| BlobrB2B | B2B | — | Antoine Magron | blobr.io |
| Blockade GamesFintech | Fintech | Indianapolis, United States | Ben Heidorn | blockade.games |
| BlockaidB2B | B2B | — | Ido Ben-Natan | blockaid.io |